The error occurred while applying a result map.

--- The error occurred in com/lgy/model/Worker.xml.  
--- The error occurred while applying a result map.  
--- Check the selectAllWorkers-AutoResultMap.  
--- The error occured while instantiating the result object  
--- Cause: java.lang.RuntimeException: JavaBeansDataExchange could not instantiate result class.  Cause: java.lang.InstantiationException: com.lgy.model.Worker; nested exception is com.ibatis.common.jdbc.exception.NestedSQLException:   
--- The error occurred in com/lgy/model/Worker.xml.  
--- The error occurred while applying a result map.  
--- Check the selectAllWorkers-AutoResultMap.  
--- The error occured while instantiating the result object  
--- Cause: java.lang.RuntimeException: JavaBeansDataExchange could not instantiate result class.  Cause: java.lang.InstantiationException: com.lgy.model.Worker
    at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:84)

出現這個錯誤是因爲Worker對象已經有了帶參數的構造函數，卻沒有爲Worker對象寫一個空的構造函數。加上下面紅色部分就行了。或者把Worker全部的構造函數都刪除。

//    ibatis須要一個不帶參數的構造函數
    public Worker() {
    }

    public Worker(String name, String telephone) {
        this.name = name;
        this.telephone = telephone;
    }